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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b32c5c6f4b4ce50a1a13c9031aeb73951592481a051db9d066fdd2162361ff2c' 
  AND token = 'MT2bm6j4D4ZvPP2B7jUzeeEhqbSn/IxFr7hfDk91cJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}